TABLE
2.1. Cochlear morphometry in cetacean, amphibious, and nonaquatic mammals
Audible
Basilar
Animal
frequency
membrane
Quter
Basal
Basal
Apical
Apical
Basal
Apical
Common
weight
range
Cochlear
length
lamina
thickness
width
thickness
width
ratio
ratio
Species
name
(kg)
(kHz)
type
Turns
(mm)
(mm)
(~m)
(~m)
(~m)
(~m)
(t/w)
(t/w)
De/phinus
Common
70
II
2.25
30.7
t
50
-
294
de/phis
dolphin
Grampus griseus
Risso's
-
2-110
II
2.5
41.0
t
22
40
5
420
0.550
0.0119
dolphin
Inia geoffrens is
Boutu
130
1-150
I
1.5
38.2
Lagenorhynchus
White-beaked
-
-
II
2.25
34.8
8.5
22
40
5
360
0.500
0.0139
a/birostris
dolphin
Lagenorhynchus
White-sided
120
0.3-140
II
2.0
33.8
t
35
-
300
obliquidens
dolphin
Phocoena
Harbor
50
0.5-180
[
1.5
22.5
17.6
25
30
5
290
0.833
0.0172
phocoena
porpoise
Phocoenoides
Dall's
-
-
2.0
29.1
t
49
404
dalli
porpoise
Physeter
Sperm whale
20,000
-
[
1.75
54.3
t
50
-
800
0.34
catodon
Stenella
Spotted
100
-
II
2.5
36.9
8.4
25
40
5
400
0.625
0.0125
attenuata
dolphin
Tursiops
Bottlenose
155
0.2-160
II
2.25
38.9
10.3
25
35
5
380
0.714
0.0132
truncatus
dolphin
Ba/aenoptera
Minke whale
8,000
-
M
2.25
50.6
-
100
-
1,500
-
-
~
acutorostrata
()
Ba/aenoptera
Blue whale
100,869
M
2.25
71.0
C1l
-
-
-
-
-
-
...
l>l
museu/us
(')
C1l
Ba/aena
Bowhead
42,201
M
2.25
56.5
-
7
120
2
1,670
0.062
0.0015
l>l
I:l
mysticetus
whale
tTl
Ba/aenoptera
Fin whale
-
M
2.5
64.7
-
5
100
2
2,200
0.050
0.0010
l>l
...
physa/us
Vl
Euba/aena
Northern right
31.837
-
M
2.5
54.1
7
125
2
1,500
0.056
0.0017
g/acialis
whale
~
\0